Rep. Jared Polis, (D-CO), discusses the briefing on Capitol Hill about the legalization of marijuana. Right now we have an active conflict between Washington law, Colorado law and national law, state laws and local laws are in direct conflict with federal law, Rep. Polis says.

NBC News correspondent Harry Smith takes an inside look at "O.pen Vape," a company that has created a high-tech device to smoke hash. Smith also comments on the "windfall of money" the taxation of marijuana will give Colorado.

Every day we went out to shoot video it was an eye-popping experience, says NBC News Correspondent Harry Smith, talking about his new documentary on the big business of marijuana. Two pot shops in Colorado brought in about $1 million in total sales in January, producing about $56,000 in local sales taxes. Forty percent of the business comes from edibles, says Smith.

Open Vape sells one of the fastest growing products in legal pot - the vape pen - similar to an e-cigarette but with marijuana oil. Chief Revenue Officer Todd Mitchem tells NBC News' Harry Smith it's only a matter of time before his company is worth billions.